Carbon dioxide dynamics and controls in a deep-water wetland on the Qinghai-Tibetan Plateau

	Carbon dioxide dynamics and controls in a deep-water wetland on the Qinghai-Tibetan Plateau
	Hirota, Mitsuru ; Tang, Yanhong ; Hu, Qiwu ; Hirata, Shigeki ; Kato, Tomomichi ; Mo, Wenhong ; Cao, Guangmin ; Mariko, Shigeru
刊名	ecosystems
	2006-06-01
卷号	9 期号:4 页码:673-688
关键词	alpine ecosystem aquatic plants NEP water depth wetland zonal vegetation
合作状况	其它
中文摘要	to initially characterize the dynamics and environmental controls of co2, ecosystem co2 fluxes were measured for different vegetation zones in a deep-water wetland on the qinghai-tibetan plateau during the growing season of 2002. four zones of vegetation along a gradient from shallow to deep water were dominated, respectively by the emergent species carex allivescens v. krez., scirpus distigmaticus l., hippuris vulgaris l., and the submerged species potamogeton pectinatus l. gross primary production (gpp), ecosystem respiration (re), and net ecosystem production (nep) were markedly different among the vegetation zones, with lower re and gpp in deeper water. nep was highest in the scirpus-dominated zone with moderate water depth, but lowest in the potamogeton-zone that occupied approximately 75% of the total wetland area. diurnal variation in co2 flux was highly correlated with variation in light intensity and soil temperature. the relationship between co2 flux and these environmental variables varied among the vegetation zones. seasonal co2 fluxes, including gpp, re, and nep, were strongly correlated with aboveground biomass, which was in turn determined by water depth. in the early growing season, temperature sensitivity (q(10)) for re varied from 6.0 to 8.9 depending on vegetation zone. q(10) decreased in the late growing season. estimated nep for the whole deep-water wetland over the growing season was 24 g c m(-2). our results suggest that water depth is the major environmental control of seasonal variation in co2 flux, whereas photosynthetic photon flux density (ppfd) controls diurnal dynamics.
英文摘要	to initially characterize the dynamics and environmental controls of co2, ecosystem co2 fluxes were measured for different vegetation zones in a deep-water wetland on the qinghai-tibetan plateau during the growing season of 2002. four zones of vegetation along a gradient from shallow to deep water were dominated, respectively by the emergent species carex allivescens v. krez., scirpus distigmaticus l., hippuris vulgaris l., and the submerged species potamogeton pectinatus l. gross primary production (gpp), ecosystem respiration (re), and net ecosystem production (nep) were markedly different among the vegetation zones, with lower re and gpp in deeper water. nep was highest in the scirpus-dominated zone with moderate water depth, but lowest in the potamogeton-zone that occupied approximately 75% of the total wetland area. diurnal variation in co2 flux was highly correlated with variation in light intensity and soil temperature. the relationship between co2 flux and these environmental variables varied among the vegetation zones. seasonal co2 fluxes, including gpp, re, and nep, were strongly correlated with aboveground biomass, which was in turn determined by water depth. in the early growing season, temperature sensitivity (q(10)) for re varied from 6.0 to 8.9 depending on vegetation zone. q(10) decreased in the late growing season. estimated nep for the whole deep-water wetland over the growing season was 24 g c m(-2). our results suggest that water depth is the major environmental control of seasonal variation in co2 flux, whereas photosynthetic photon flux density (ppfd) controls diurnal dynamics.
学科主题	生物科学
WOS标题词	science & technology ; life sciences & biomedicine
类目[WOS]	ecology
研究领域[WOS]	environmental sciences & ecology
关键词[WOS]	soil respiration ; temperature-dependence ; moisture conditions ; methane emissions ; boreal peatland ; gas-exchange ; dry summer ; balance ; co2 ; northern
收录类别	SCI
语种	英语
WOS记录号	WOS:000238292700014
公开日期	2009-12-08
内容类型	期刊论文
源URL	[http://ir.nwipb.ac.cn/handle/363003/1327]
专题	西北高原生物研究所_中国科学院西北高原生物研究所
作者单位	1.Natl Inst Environm Studies, Tsukuba, Ibaraki 3058506, Japan 2.Chinese Acad Sci, NW Plateau Inst Biol, Xining 810001, Peoples R China 3.Univ Tsukuba, Grad Sch Life & Environm Sci, Tsukuba, Ibaraki 3058572, Japan 4.Frontier Res Ctr Global Change, Kanazawa Ku, Yokohama, Kanagawa 2360001, Japan 5.Univ Tsukuba, Inst Biol Sci, Tsukuba, Ibaraki 3058572, Japan
推荐引用方式 GB/T 7714	Hirota, Mitsuru,Tang, Yanhong,Hu, Qiwu,et al. Carbon dioxide dynamics and controls in a deep-water wetland on the Qinghai-Tibetan Plateau[J]. ecosystems,2006,9(4):673-688.
APA	Hirota, Mitsuru.,Tang, Yanhong.,Hu, Qiwu.,Hirata, Shigeki.,Kato, Tomomichi.,...&Mariko, Shigeru.(2006).Carbon dioxide dynamics and controls in a deep-water wetland on the Qinghai-Tibetan Plateau.ecosystems,9(4),673-688.
MLA	Hirota, Mitsuru,et al."Carbon dioxide dynamics and controls in a deep-water wetland on the Qinghai-Tibetan Plateau".ecosystems 9.4(2006):673-688.